iral Review (5.NBT. A.2, 5.NBT. B.7, 5.NF. A.1) Washington County is shaped like a rectangle. It measures 15.9 miles by 9.1 miles. What is the county's area?(with work)​

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality